Question:
In your filter reviews, you say that the Sweetwater models can be frozen to
retard bacteria growth... Is this also true for the Pur Filters? I have an
older Pur Scout, and it clogs between seasons. What is the cleaning procedure
for this filter, anyway?

Answer:
Here's the answer from Shawn at PUR:

"PUR purifiers do not need to be treated between use, however a mild bleach
solution can be run through the purifier before long term storage. Since
PUR purifiers use iodine resin to disinfect bacteria and viruses after the
larger microorganisms are removed by the filter, there is no need to treat
the media for bacterial growth. This is another advantage of owning a
purifier over a microfilter."

"New PUR Scout models have pleated filter media which requires much less
maintenance than older models. The new Scout replacement cartridges are
compatible with the old Scouts. Both the old and new models can be cleaned
using a toothbrush and clean water."